Sharks

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Sharks

• Anatomy and Physiology

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Body Shapes
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Tail Shapes
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Snout and Mouth
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Snout Oddities
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Shark Skeleton
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Shark Teeth
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Great White Shark Tooth
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Grey Nurse Shark Teeth
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Megalodon Tooth
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Shark Brain
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Shark Swimming

• Swimming Shark

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Shark Heart and Circulation
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Shark Reproduction
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Sexual Dimorphism

• Female sharks are larger than males.
• Males have claspers, which are elongated pelvic
  fin edges.
• Females have a cloaca, one opening for both
  digestive and reproductive functions.
• Some scientists believe that male great whites
  become female when the reach a certain size.

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Claspers
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Cloaca
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Viviparous Shark
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Oviparous Shark
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Ovoviviparous Shark
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Shark Gills
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Spiracles
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Shark Skin - Denticles
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Countershading
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Bouyancy
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Shark Senses - Smell
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Smell Nasal Barbels
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Shark Senses - Eyesight
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Nictitating Membrane
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Shark Senses - Electricity
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Shark Senses - Vibrations
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Shark Senses - Hearing
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Shark Senses - Taste
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Sharks Hot or Cold Blooded?

• Warm Blooded Homeotherms generate heat
  internally and maintain a constant internal
  temperature
• Cold Blooded Poikilotherms have a body
  temperature that changes with external condition.

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Homeothermic Sharks
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Shark Diet - Carnivores

• Fast Moving Hunters.Great white, mako, tiger,
  hammerhead.

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Shark Diet - Carnivores

• Slow moving huntersbenthic
• Sharks such as the zebra horn, angel and
  wobbegong sharks

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Shark Diet - Carnivores

• Filter Feeding sharks such as the whale, basking,
  and megamouth sharks.

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Shark Digestion
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Shark Tongue

• Called a basihyal, the tongue is a thick piece of
  cartilage found on the floor of the mouth of a
  shark. Useless except with cookiecutter sharks.

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The End